Centre For
Intelligent Machines and
School of
Computer Science
Last updated 12/14/2005
Introduction Downloads Libraries and Tools
The McGill 3D
Shape Benchmark offers a repository for testing 3D shape retrieval
algorithms. The emphasis is on including models with articulating
parts. Thus, whereas some models have been adapted from the
the Princeton Shape
Benchmark and others have been downloaded from different web repositories,
a substantial number have been created by us using CAD modeling tools.
We provide the models in both "voxelized" form (using the .im file format, corresponding
to the KUIM package) as well as in "mesh" form (using the .ply format).
In the voxelized format voxels within the interior of an object have a different
label than those in the background. In the mesh format each object's surface is
provided in triangulated form. The mesh representations correspond to
the boundary voxels of the corresponding voxel representations. They are therefore
are "jagged" and may need to be smoothed for some applications.
The models are organized in two databases. The first contains
objects with articulating parts and the second objects whose parst undergo
minor or no articulation. Within each database there are a number of ``basic'' level categories
and in each there are typically between 20 to 30 examplars.
Click on the images to see the various exemplars in each category.
Objects with articulating parts
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| Ants | Crabs | Spectacles | Hands | Humans |
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| Octopuses | Pliers | Snakes | Spiders | Teddy-bears |
Objects with moderate or no part articulation
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| Tables | Cups | Chairs | Airplanes | Dolphins |
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| Birds | Four-limbs | Dinosaurs | Fishes |
2.
Downloads
Before downloading files, please email
us so that we can know who is using this repository.
NEW! Manifold mesh versions of models below in .off format contributed by Dr. Alexander Agathos, Institute of Informatics and Telecommunications, NCSR "DEMOKRITOS", Greece. Thank you very much Alexander!
You
can also download both the original ".im " format files as well as the ".ply" format mesh files.
Objects with articulating parts: .including im format and .ply format (.tar.gz, 175M) Objects with moderate or no part
articulation: including .im format and .ply format (.tar.gz, 119M) Small
subsets:
| Ants | .im files | .ply files | Tables | .im files | .ply files |
| Crabs | .im files | .ply files | Cups | .im files | ..ply files |
| Spectacles | .im files | .ply files | Chairs | .im files | .ply files |
| Hands | .im files | .ply files | Airplanes | .im files | .ply files |
| Humans | .im files | .ply files | Dolphins | .im files | .ply files |
| octopuses | .im files | .ply files | Birds | .im files | .ply files |
| Pliers | .im files | .ply files | Four-limbs | .im files | .ply files |
| Snakes | .im files | .ply files | Dinosaurs | .im files | .ply files |
| Spiders | .im files | .ply files | Fishes | .im files | .ply files |
| Teddy-bears | .im files | .ply files |
3. Libraries and Visualization tools
OpenGL should be installed on your machine.
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.im files |
Matlab:
The .im images are raw data with a header of 1024 bytes in front. All images in the mcgill database are 128x128x128 arrays of bytes, so to read them in matlab do the following:
%open the file for reading
fid = fopen('1.im','r');
%got to the first byte after the header
status = fseek(fid,1024,'bof');
%read the data
data = fread(fid);
%close the file
fclose(fid);
%reshape the data into a 3D array
data3d = reshape(data,128,128,128);
Visualization:
VTK should be installed on your machine.
We have two handy applications visuim
and vvisualize-s to display the .im files. These binaries were
compiled for RedHat Linx and need libglut.so.3. We will make the source code available soon.
Processing package: KUIM package (http://infocom.cheonan.ac.kr/~nykwak/kuim/kuim.html)
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.ply files |
Visualization: There are quite a few tools online to view .ply files, such as TetView and Scanalyze.